.... but I'm a big Robin Williams fan ...
You've seen..., well, pretty much anything he's done in the last 15-20 years, right?
I do hope you're excepting Insomnia and One Hour Photo.
It would be interesting if more than 20 years after being linked with the role of the Joker and then the Riddler Williams finally did play a Bat-villain. Given how well he worked with Nolan in Insomnia, he might actually suit a creepy role like Strange better than an OTT role like Joker or Riddler.